Follow these instructions to sign in to HBO MAX on your SMART TV using hbomax.com/tvsignin:
On your Smart TV, launch HBO GO (Apple TV, Android TV, LG TV, Samsung TV, roku, etc).
Using your login information, click "Log in with HBO MAx ID."
Enter the the address and password you used to sign up.
Enter the the address and password you used to sign up.
You must carefully write down the code because it is necessary for activation.
Read Also: Nfl.com/Activate | Twitch.Tv/Activate